US5108721A - Treatment of high nickel slimes - Google Patents

Treatment of high nickel slimes Download PDF

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Publication number
US5108721A
US5108721A US07/660,748 US66074891A US5108721A US 5108721 A US5108721 A US 5108721A US 66074891 A US66074891 A US 66074891A US 5108721 A US5108721 A US 5108721A
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Prior art keywords
slimes
stage
nickel
leaching
pressure
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Expired - Fee Related
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US07/660,748
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English (en)
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Viken P. Baboudjian
Bernard H. Morrison
Jack S. Stafiej
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Noranda Inc
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Noranda Inc
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Assigned to BANK OF AMERICA CANADA, AS AGENT reassignment BANK OF AMERICA CANADA, AS AGENT SECURITY AGREEMENT Assignors: WIRE ROPE INDUSTRIES LTD. (FORMERLY 9084-6999 QUEBEC, INC.)
Assigned to BANK OF AMERICA, NATIONAL ASSOCIATION reassignment BANK OF AMERICA, NATIONAL ASSOCIATION ASSIGNMENT OF SECURITY AGREEMENT Assignors: BANK OF AMERICA CANADA
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/04—Obtaining nickel or cobalt by wet processes
    • C22B23/0407—Leaching processes
    • C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
    • C22B23/043—Sulfurated acids or salts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S204/00—Chemistry: electrical and wave energy
    • Y10S204/13—Purification and treatment of electroplating baths and plating wastes

Definitions

  • This invention relates to the treatment of anode slimes from the electrolytic refining of copper, and more particularly to the treatment of high nickel anode slimes.
  • the electrolytic refining of copper is a process in which a relatively impure copper is electrolytically refined into a pure cathode.
  • copper goes into solution and deposits at the cathode whereas selenium, tellurium and other elements that do not dissolve in the electrolyte sink to the bottom of the electrolytic tank as slimes.
  • Nickel in the anodes when less than 0.3-0.35% dissolves into the electrolyte. However, when the nickel is above this level, it reports to the slimes as a refractory NiO.
  • copper anode slimes vary widely in composition, they generally contain significant amounts of copper, nickel, selenium, tellurium, lead, silver, gold and some platinum group metals along with nuisance elements such as arsenic, bismuth and antimony.
  • the slimes are normally treated for their valuable components.
  • One method for treating anode slimes is disclosed in Canadian Patent No. 1,091,035 which was issued on Dec. 9, 1980. This method comprises the steps of leaching the slimes in an autoclave with dilute sulphuric acid under an oxygen partial pressure of between 2 and 3.5 bars and at an elevated temperature between 110° and 140° C. until copper and tellurium in the slimes are substantially dissolved, and effecting a liquid-solid separation of the leached slurry so as to separate the leach liquor from the leach slimes.
  • the pressure leach liquor (PLL) is treated with metallic copper to cement the tellurium as copper telluride and such copper telluride is separated from the remaining solution for production of tellurium.
  • the remaining solution is suitable for the production of copper sulphate.
  • the pressure leached slimes (PLS) containing mainly selenium, lead, silver, gold and remaining impurities are dried, mixed with a binder and pelletized.
  • the pellets are then roasted to remove selenium as selenium dioxide and the roasted pellets are smelted in a Dore furnace to remove the remaining impurities leaving a so-called Dore metal containing essentially silver and gold.
  • Dore metal containing essentially silver and gold.
  • the leached slimes are dried and fed directly into a TBRC furnace for smelting and refining to recover the selenium and produce a Dore metal.
  • the nickel dissolving electrochemically and entering the electrolyte presented no difficulty from a treatment standpoint whereas, nickel entering the slimes necessitated extensive treatment consisting of repeated roasting and leaching operations before the nickel content was low enough to permit the slimes to proceed to the Dore furnace.
  • the process consisted of controlling the oxygen and thus reducing the amount of insoluble NiO reporting to the slimes. Although the process has its advantages and is applicable to control Ni in slimes to a certain level, high nickel anodes will produce high nickel slimes even at low oxygen levels.
  • the above process requires two separate vessels one for de-copperizing the slimes and one for de-nickeling the slimes.
  • the vessel used for de-nickeling is a high-pressure vessel and either superheated steam or electric heating is used. Furthermore, the process dissolves Ag and Se which need to be precipitated with SO 2 and since Te is also dissolved a Se-Te cross contamination is likely to occur. The above renders the whole process complex.
  • the process in accordance with the present invention comprises:
  • At least 50% of the tellurium and at least 70% of the arsenic content of the anode slimes are solubilized at the end of the second stage.
  • Any antimony and bismuth dissolved in the first stage is precipitated at the end of the second stage.
  • the leach time for each stage of the process is between 3 and 4 hrs.
  • FIG. 1 illustrates the % Ni in anodes versus % Ni reporting to slimes at varying oxygen levels
  • FIG. 2 illustrates the % Ni in anodes versus Ni in slimes at varying oxygen levels
  • FIG. 3 illustrates Ni extraction in the autoclave under the operating conditions disclosed in Canadian Patent No. 1,091,035.
  • FIG. 4 illustrates the temperature and pressure profiles in the autoclave in the process in accordance with the present invention
  • FIGS. 5 and 6 show the extraction kinetics for Cu, Ni and Te.
  • FIG. 7 shows the kinetics of As, Sb and Bi extraction and precipitation.
  • Nickel in leached slimes in excess of 3% create slagging difficulties during smelting as mentioned previously.
  • a process was developed at the 4L stage to overcome the above drawbacks.
  • the process consisted of a three hours leach at 4.5 bar and 160° C. for nickel removal, with no oxygen sparging at 20% solids and an initial acid concentration of 250 gpl. This was followed by another three hours leach at 120° C. with oxygen sparging and a total pressure leach of 2.8 bar.
  • the second leach to extract Cu and Te and precipitate Sb and Bi leached in the first stage, is carried in the same vessel. Thus the double handling of solids is eliminated.
  • Te extraction was 66% and the As, Sb and Bi leached were 88%, 6.5% and 1.4%, respectively.
  • the 10 hrs cycle time may be reduced by decreasing the heating and cooling times by proper engineering design.
  • the reaction time may also be reduced without significantly effecting the Cu, and Te levels in the PLS, but at the expense of somewhat higher Ni levels. These changes should lower the total cycle time to 6-7 hrs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US07/660,748 1990-04-17 1991-02-26 Treatment of high nickel slimes Expired - Fee Related US5108721A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2014733 1990-04-17
CA 2014733 CA2014733C (en) 1990-04-17 1990-04-17 Treatment of high nickel slimes

Publications (1)

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US5108721A true US5108721A (en) 1992-04-28

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US07/660,748 Expired - Fee Related US5108721A (en) 1990-04-17 1991-02-26 Treatment of high nickel slimes

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US (1) US5108721A (fi)
BE (1) BE1006723A3 (fi)
CA (1) CA2014733C (fi)
FI (1) FI911839A (fi)
SE (1) SE505410C2 (fi)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5573739A (en) * 1994-10-28 1996-11-12 Noranda, Inc. Selective bismuth and antimony removal from copper electrolyte
CN1301338C (zh) * 2005-09-20 2007-02-21 云南冶金集团总公司 铜阳极泥加压酸浸预处理回收铜的新方法
US10106868B2 (en) * 2015-11-20 2018-10-23 Yanggu Xiangguang Copper Co., Ltd. Process for extracting noble metals from anode slime
CN109609754A (zh) * 2019-01-10 2019-04-12 江西新金叶实业有限公司 一种贵金属提取过程产生的废物回收工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113981242A (zh) * 2021-11-05 2022-01-28 金川集团股份有限公司 一种利用活性剂在氯化镍溶液中进行置换沉铜的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322786A (en) * 1939-02-11 1943-06-29 American Smelting Refining Process of electrolytic parting
US4002544A (en) * 1975-04-03 1977-01-11 Outokumpu Oy Hydrometallurgical process for the recovery of valuable components from the anode slime produced in the electrolytical refining of copper
US4229270A (en) * 1978-04-12 1980-10-21 The International Nickel Co., Inc. Process for the recovery of metal values from anode slimes
CA1091035A (en) * 1977-05-03 1980-12-09 Bernard H. Morrison Slimes treatment process
US4293332A (en) * 1977-06-08 1981-10-06 Institute Of Nuclear Energy Research Hydrometallurgical process for recovering precious metals from anode slime
US4666514A (en) * 1985-01-25 1987-05-19 Austria Metall Aktiengesellschaft Hydrometallurgical process for recovering silver from copper-electrolysis anode sludge

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE755580A (fr) * 1969-09-24 1971-02-15 Norddeutsche Affinerie Procede pour decomposer la boue anodique de l'electrolyse du cuivre
JPS505131A (fi) * 1973-05-16 1975-01-20
DE2841271C3 (de) * 1978-09-22 1981-11-19 Th. Goldschmidt Ag, 4300 Essen Verfahren zur Aufarbeitung von Buntmetallhydroxidschlammrückständen
JPS55128595A (en) * 1979-03-26 1980-10-04 Furukawa Electric Co Ltd:The Removal of selenium eluted from decoppering liquid of anode slime of copper electrolysis
CA1171287A (en) * 1980-11-05 1984-07-24 William R. Hatch Acid leaching of lateritic nickel ores

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322786A (en) * 1939-02-11 1943-06-29 American Smelting Refining Process of electrolytic parting
US4002544A (en) * 1975-04-03 1977-01-11 Outokumpu Oy Hydrometallurgical process for the recovery of valuable components from the anode slime produced in the electrolytical refining of copper
CA1091035A (en) * 1977-05-03 1980-12-09 Bernard H. Morrison Slimes treatment process
US4293332A (en) * 1977-06-08 1981-10-06 Institute Of Nuclear Energy Research Hydrometallurgical process for recovering precious metals from anode slime
US4229270A (en) * 1978-04-12 1980-10-21 The International Nickel Co., Inc. Process for the recovery of metal values from anode slimes
US4666514A (en) * 1985-01-25 1987-05-19 Austria Metall Aktiengesellschaft Hydrometallurgical process for recovering silver from copper-electrolysis anode sludge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5573739A (en) * 1994-10-28 1996-11-12 Noranda, Inc. Selective bismuth and antimony removal from copper electrolyte
CN1301338C (zh) * 2005-09-20 2007-02-21 云南冶金集团总公司 铜阳极泥加压酸浸预处理回收铜的新方法
US10106868B2 (en) * 2015-11-20 2018-10-23 Yanggu Xiangguang Copper Co., Ltd. Process for extracting noble metals from anode slime
CN109609754A (zh) * 2019-01-10 2019-04-12 江西新金叶实业有限公司 一种贵金属提取过程产生的废物回收工艺

Also Published As

Publication number Publication date
SE9100693D0 (sv) 1991-03-08
FI911839A0 (fi) 1991-04-16
BE1006723A3 (fr) 1994-11-29
FI911839A (fi) 1991-10-18
SE505410C2 (sv) 1997-08-25
CA2014733C (en) 1996-09-17
SE9100693L (sv) 1991-10-18
CA2014733A1 (en) 1991-10-17

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